YANGON’S STORMWATER MANAGEMENT ISSUES - … 4_Yangon’s... · Yangon City CHINA THAI LAND INDIA BANGLADEAH ... YANGON CITY MAP. ... Limitations in use of sluice gates

YANGON’S STORMWATER MANAGEMENT ISSUES

PRESENTED BY

GROUP-4

OUTLINES

DRAINAGE SYSTEM

SOURCE OF FLOOD

THE STEPS BEING TAKEN NOW

SUGGESTIONS

DRAINAGE SYSTEM

• The stormwater of the drainage basin is drained out by natural gravity flow.

• Most of the outlets are without sluice gates and affected by tidal water.

• The drainage system was built when Myanmar was under British rule.

Yangon City

CHINA

THAI LAND

INDIA

BANGLADEAH

Yangon City, the Second Capital of Myanmar

Yangon Division

• 6 millions of population

• 33 townships and 612 square kilometer wide

YANGON CITY MAP

RIVERS OUTLETS AROUND YANGON CITY

SOURCE OF FLOOD

1. POPULATION GROWTH EFFECT

Rapid Urbanization

Increase in impervious surface

Loss of catchment areas

0

2

4

6

8

1983 1995 2000 2013

POPULATION ( million)

2. Existing drainage structure

Unlined Open Channel

Lack of sufficient sluice gates

Limitations in use of sluice gates

Inadequate depth of culvert

Utilities (water pipes, cables, etc.)

IN NEED OF SLUICE GATES IN NEED OF TECHNOLOGY

UNLINED CHANNELS UTILITIES IN THE CULVERTS

INADEQUATE DEPTH OF BOX CULVERT

3. CLIMATE CHANGE

More Frequent Storms

More Intense Rainfall

4. TIDAL WATER

River Around

Spring and Neap Tide

Water Gate Facility

Ground Elevation

Flooding by Tidal Water at Lanmadaw-Kanar Junction

Tidal Water During High Tide Day

Rainy Season Hot Season

Upper Pansodan Channel

5. DISPOSAL OF GARBAGE

Lack of discipline in disposal of garbage

Weakness in law enforcement

Requirement of sufficient trash cans

Educative campaign to the public

SOLID WASTES LAW ENFORCEMENT

STEPS BEING TAKEN TO PREVENT FLOOD

MANUAL DERDGING MANUAL DREDGING

DREDGING BY MECHINE DREDGING BY MACHINE

DREDGING OF BOX-CULVERTS AT MYANMA GONYE ROAD

RECONSTRUCTION OF CULVERT

DREDGING A CHANNEL BY MECHINE

23street Slide gate

Slide Gate At Kanar Road

22-23th Street Water Gate (Latha Township)

Water Gate At River Bank(Example)

Yangon River Exit

MANUAL DREDGING WORKS

SUGGESTIONS

Lining of River Outlet Channels

Reconstruction of Some Drainage Facilities

Educating Civilians

Law Amendment

Water Gates, Pumps etc

Technical Transfer or Help

THANKS YOU FOR YOUR KIND ATTENTION